Improvement in combined wrenches and gr



Patented March 25, 1873,

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AM Pllmv-umosmmlcca N. (0.9onne& moc sss) UNITED STATES PATENT OEEIoE.

SIMON B. DEXTER, 0E MAson CITY, IOWA.

IMPROVEMENT IN COMBINED WRENCHES AND GRAPPLlNG-TOOLS.

Specification forming part of Letters Patent No. 137,129, dated March 25, 1873.

To all whom it may concern:

Be it known that I, SIMON B. DEXTER, of Mason City, in the county of Gerro Gordo and State of Iowa, have invented a new and useful Improvement in Adjustable Combined Wrench and Grappling-Tool, of which the following is a specification This invention relates to improvements in a combined pinchers and grappling-tool for which Letters Patent of the United States have been already granted me, the invention consisting in the mode of connecting the shank and wedge-shaped slide with the handle and in the operation thereof, as will be hereinafter more fully set forth and described.

The accompanying drawing is a view of the improved instrument, the handle and parts connected therewith being shown in longitudinal section.

Similar letters of reference indicate corresponding parts.

A represents the jaws, the jaws being on the short ends of the levers B B. O is a slotted cross-bar. or fulcrum-plate, in the slots of which the levers are confined by the adjustable fulcrum-pins D D. E is the shank-rod, rigidly attached to the center of the fulcrum-plate G, and extending through the handle, with a screw-thread cut thereon, as represented in the drawing. F is the wedge-shaped slide, consistin g of a bent rod, with inclined sides. The shank-rod passes through the eye G in this slide. The ends of the slide are attached to the swivelH on the end of the handle. The levers B B are attached to the sides of the slide by the eyes I I. J represents the swivelband, which acts as a screw-nut upon the shank-rod E. Kis a broad ferrule upon the handle L, andMis a screw to fasten the for rule to the swivel-band J.

By turning the handle, the swivel-band is turned, and the swivel H, and consequently the slide F, is moved up or down on the shankrod E. As they slide, it will be seen that the long ends of the levers will be spread apart or brought together, and the jaws will be adj usted nearer together or further apart, as may be required. In this manner the jaws may be adjusted with the greatest nicety and forced toward each other with sufficient power to make the instrument valuable as a hand vise for many purposes.

To use the tool as a clamping-iron, the small screw M is taken out, and the swivel-band J is removed. The screw-thread upon the inside of the ferrule, which before attached the handle to the swivel-band, now attaches the handle to the swivel, which swivel plays freely on the rod E. The jaws are now made to clamp and hold an article by simply lifting up the handle.

N is a spiral spring around the shank-rod, which acts against the fulcrum -plate, and forces the slide F down through the eyes of the levers B B, and consequently gives the jaws a limited griping force. By means of the swivel connection, the jaws are moved and made to compress with great force, and maybe adjusted to a bolt head or nut with the greatest precision.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. In combination with the jaw-levers AB and wedge-shaped slide F, arranged to operate substantially as described, the swivel and band H and J, ferrule K, handle L, and screw M, arranged substantially as and for the purposes set forth.

2. The spring N, in combination wit-h the slide F, as and for the purposes described.

' SIMON B. DEXTER.

Witnesses:

W. G. STANBERY, NATHAN READ, O. H. STILSON. 

